A high-efficiency matrix-type LED device comprises an epitaxial wafer on which a plurality of independently insulated LEDs are formed by a method of manufacturing integrated circuits; and a conducting line mounted on each one of the LEDs by an evaporation method for forming a large-sized matrix-type LED unit capable of increasing brightness, simplifying manufacturing procedure, and saving manufacturing cost effectively. In addition, a sub-mount having a two-way Zener diode embedded therein is applied to the matrix-type LED unit. By mounting the matrix-type LED unit on the sub-mount, the two-way Zener diode can protect the LEDs against damage from electrostatic discharge (ESD) so as to increase lifetime of LEDs.